Title : Means for Enhancing the Target Detection Capability of a Radar Receiver.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Thompson,Lowell V

Report Date : 12 Mar 1974

Pagination or Media Count : 5

Abstract : The patent describes a non-linear coupling circuit for incorporation into the I-F amplifier section of a radar receiver in order to improve the sub-clutter visibility thereof, such circuit acting in a discriminatory fashion to pass therethrough desired target signals while materially attenuating extended clutter and 'jamming' energy. The circuit includes a pair of crystal diodes to which is applied a bias voltage derived from this clutter or jamming energy, such bias acting to preclude passage through the diodes of a major portion of the undesired signal while the target indications undergo negligible attenuation. The visibility of the latter is thus greatly enhanced on the radar scope.